Hi Timothyo,
I started with a thin wash of Tamiya acrylic white over a base of desert yellow which I normally use after modifications, sanding etc.
Then I follow up with thin coats of acrylic burnt umber to desired shade
I then follow up with thin coats of acrylic raw umber to desired shade.
Finally a very thin wash of acrylic flat black to desired shade.
seal with dulcoat, pretty much your basic colors for wood effect, hope this helps?
Michael D.